Add support to overview + mouse click in `v4`

[lucasresck]

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Overview (hot corner or Super key) + mouse click support is being added to GNOME 45 (https://github.com/lucasresck/gnome-shell-extension-alt-tab-scroll-workaround/pull/25) (it will probably be released in v5) but it is not currently supported in v4 (GNOME 44).

It should be easy to adapt https://github.com/lucasresck/gnome-shell-extension-alt-tab-scroll-workaround/commit/444f1c54b7ac17ac3a7254725707c1cc92e4ba32 to v4.

Related to https://github.com/lucasresck/gnome-shell-extension-alt-tab-scroll-workaround/issues/24 and https://github.com/lucasresck/gnome-shell-extension-alt-tab-scroll-workaround/issues/10.

[lucasresck]

The current extension does not work with GNOME 45 and the updated extension (https://github.com/lucasresck/gnome-shell-extension-alt-tab-scroll-workaround/pull/25) will not work with GNOME < 45. I created the branches gjs-legacy and gjs-legacy-develop to keep support for previous versions (< v5).